McGrath gave Grand Rapids a 2-1 lead with his second goal, which came on a power play 3:52 into the second.

Williams, who spent the previous four years with Toronto before coming to Grand Rapids this fall, added another power-play goal with 8:48 left in the second period. He took a feed from Tatar and recorded his team-leading ninth goal of the season.

GRIFFINS 6, MARLIES 3

Next game: Grand Rapids at Chicago Wolves, 8 p.m. Wednesday

Radio: WOOD-AM (1300)

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Less than 3 minutes later, Ritola made it 4-1 when he banged in a rebound.

The Marlies have been outscored 28-9 in the second period this season.

Tardif put the game out of reach when he scored the Griffins' third power-play goal of the game 5:51 into the third, and Tatar closed out the scoring with an empty-net goal with 1:53 remaining.

Toronto's Alex Foster scored twice in the final 12 minutes to narrow the margin of defeat.

McGrath also scored with 8:19 left in the first period to give Grand Rapids a 1-0 lead.

Moments after a Toronto penalty expired, he snapped a shot from the right circle that beat former Griffins goalie Joey MacDonald, who faced his former team for the first time.

The Marlies tied it at 1-1 with 22 seconds left in the first when Jay Rosehill redirected Brett Festerling's wrist shot past Larsson.

MacDonald, who finished with 17 saves, appeared in 164 games for the Griffins from 2002-07. He still holds a number of franchise records, including shutouts (16).